At the suggestion of the Rev. Elwood Worcester, Ph.D., D.D., two magazine editors, and two publishing houses, the pamphlet is now enlarged into a book with the earnest hope that the suggestions it contains may be of service to many whom the pamphlet, privately printed and gratuitously distributed, could not reach at all. There are books enough, perhaps, on the theory of sleep. The volume by Marie de Manaceïne on _Sleep—Its Physiology, Pathology, Hygiene, and Psychology_ will surely long remain the standard work. Dr. Upson’s _Insomnia and Nerve Strain_ is based on the author’s discovery of the vaso-neural circuit and will not be neglected by those who wish to understand certain physical obstacles to sleep which have hitherto been largely overlooked. _Religion and Medicine_, the official book of the Emmanuel Movement, is indispensable to any knowledge of the drugless cure of sleeplessness and other nervous functional disorders. And the writings of Dr. S. Weir Mitchell, Dr. Woods Hutchinson, and Dr. J. Madison Taylor are, of course, of lasting value on this subject. The purpose of this little book is very simple. It is designed to help physicians, Emmanuel workers, and others who believe in the art of natural sleep to aid those committed to their care. It is designed, also, to be of service to the thousands who never go to anyone for aid in learning how to sleep, and to this end is kept as free as possible from all technical terms and all theoretical discussions. To Dr. Worcester I owe the title of the book; to Rev. H. L. Taylor of the Emmanuel Church staff certain of the illustrative cases from the Emmanuel Clinic in Boston; to Mr. W. P. Cutter, Librarian of the Forbes Library in Northampton, many special courtesies; and to Dr. Francis S. Wilson, expert diagnostician and experienced practitioner, goodly counsel in the preparation of the book. Trusting that directly or indirectly this little book may set many an unhappy victim of insomnia free from his hard bondage, I send it forth in faith. L. P. P. ST. JOHN’S RECTORY, NORTHAMPTON, MASS. September 15, 1908. CONTENTS PAGE OUR NATIONAL DISEASE 1 THEORIES OF SLEEP 5 WHAT SLEEP REALLY IS 8 THE NECESSITY OF SLEEP 12 INSOMNIA AND ITS CAUSES 15 THE VALUE OF DRUGS 18 THE REMOVAL OF ALL PHYSICAL CAUSES 25 GENERAL DIRECTIONS 29 SECONDARY AIDS TO SLEEP 33 DR. LEARNED’S PLAN 35 RELAXATION AND RHYTHMIC BREATHING 38 THE EMMANUEL METHOD 43